To watch: NOVA's "Earth From Space"

The PBS science program NOVA aired a two-hour special last night with space-based visions of our planet. "Earth From Space" was produced in consultation with NASA scientists, and transforms data from earth-observing satellites into "dazzling visual sequences, each one exposing the intricate and surprising web of forces that sustains life on earth." livescience.com has a Q&A with Executive Producer Paula Apsell. It'll be out on blu-ray in April.